A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5935-00-056-7445
NSN 6650-01-399-0628
NSN 5915-00-504-9416
NSN 6145-01-026-9085
NSN 5835-00-315-3797
NSN 6650-01-390-3205
NSN 4140-01-426-8428
NSN 6620-01-050-2866
NSN 5920-01-294-4589
NSN 6650-00-448-8290
NSN 5985-00-826-1735
NSN 5960-00-222-7772